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Cheap flights from London Stansted Airport to Washington, D.C. Dulles Intl Airport from £374

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 29/3. Fares are subject to change and may not be available on all flights or dates of travel.
STN — IAD
10 Apr — 17 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Stansted to Dulles Intl

Enter your travel dates to find the best prices.

Cheapest flights from Stansted to Dulles Intl
Explore the most affordable flight options available from Stansted to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 March 2026.

Thu 23/408:15
STN
-
IAD
2 stops16h 05m
Multiple Airlines
Sun 26/420:30
IAD
-
STN
2 stops15h 45m
Multiple Airlines
Deal found 9/3£410
Tue 21/406:30
STN
-
IAD
2 stops17h 50m
Multiple Airlines
Tue 28/420:30
IAD
-
STN
2 stops18h 05m
Multiple Airlines
Deal found 7/3£429
Mon 20/408:15
STN
-
IAD
2 stops16h 05m
Multiple Airlines
Mon 27/420:30
IAD
-
STN
2 stops17h 20m
Multiple Airlines
Deal found 6/3£432
Thu 16/406:00
STN
-
IAD
2 stops19h 35m
Multiple Airlines
Mon 27/420:30
IAD
-
STN
2 stops22h 50m
Multiple Airlines
Deal found 6/3£451
Thu 19/308:30
STN
-
IAD
1 stop16h 00m
Multiple Airlines
Mon 23/318:05
IAD
-
STN
1 stop9h 45m
Multiple Airlines
Deal found 9/3£464
Mon 13/417:20
STN
-
IAD
2 stops26h 50m
Multiple Airlines
Mon 20/420:30
IAD
-
STN
2 stops22h 50m
Multiple Airlines
Deal found 6/3£465
Wed 15/408:30
STN
-
IAD
1 stop12h 15m
Multiple Airlines
Wed 22/420:55
IAD
-
STN
1 stop17h 35m
Multiple Airlines
Deal found 6/3£469
Mon 13/408:10
STN
-
IAD
2 stops36h 00m
Multiple Airlines
Sun 26/420:30
IAD
-
STN
2 stops21h 50m
Multiple Airlines
Deal found 6/3£474
Tue 7/413:15
STN
-
IAD
1 stop11h 20m
Multiple Airlines
Tue 14/421:05
IAD
-
STN
1 stop17h 30m
Multiple Airlines
Deal found 8/3£476

Find flight deals from Stansted to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from Stansted (STN) to Dulles Intl (IAD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 11 March 2026.

Round-trip from

£410

One-way from

£374

Popular in

July

Cheapest in

February

Average price

£510
23/4-26/4
  • 23/4-26/4
  • 4 total stops
  • 31h 50m total
  • London to Washington, D.C.
Search Deals
29/3
  • 29/3
  • 3 total stops
  • 30h 30m total
  • London to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£56 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£8 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Stansted to Dulles Intl that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 11 March 2026.
Use the filters below to find and compare flights from London Stansted Airport to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Thu 16/4

17:35-11:35

1 stop23h 00m

Washington, D.C. Dulles Intl

Wed 22/4

21:45-22:10

1 stop19h 25m

£638

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Wed 10/6

17:45-19:50

1 stop31h 05m

Washington, D.C. Dulles Intl

Mon 20/7

21:45-16:50

1 stop38h 05m

£641

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Wed 10/6

17:45-19:50

1 stop31h 05m

Washington, D.C. Dulles Intl

Sat 11/7

21:45-09:55

1 stop31h 10m

£648

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Mon 8/6

10:50-11:35

1 stop29h 45m

Washington, D.C. Dulles Intl

Sat 11/7

21:45-09:55

1 stop31h 10m

£655

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Fri 24/4

17:35-11:35

1 stop23h 00m

Washington, D.C. Dulles Intl

Fri 1/5

13:20-09:55

1 stop15h 35m

£658

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Sat 18/4

10:50-19:50

1 stop38h 00m

Washington, D.C. Dulles Intl

Sat 25/4

13:20-16:40

1 stop22h 20m

£658

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Tue 16/6

06:55-19:50

1 stop17h 55m

Washington, D.C. Dulles Intl

Tue 30/6

21:45-16:40

1 stop37h 55m

£727
Fastest return journey

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Wed 17/6

06:55-19:50

1 stop17h 55m

Washington, D.C. Dulles Intl

Fri 26/6

13:20-09:55

1 stop15h 35m

£738

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Sun 12/4

17:35-11:35

1 stop23h 00m

Washington, D.C. Dulles Intl

Mon 20/4

21:45-22:10

1 stop19h 25m

£748

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Mon 13/4

10:50-11:35

1 stop29h 45m

Washington, D.C. Dulles Intl

Sun 19/4

13:20-22:10

1 stop27h 50m

£760

Flights are sorted by cheapest return flights first.

Deals found on 8/3

Showing 1-10 of 23 resultsSorted by cheapest first
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Best time to book a flight from Stansted to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Stansted with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from London Stansted Airport to Washington, D.C. Dulles Intl Airport

How often are flights from London to Washington, D.C. delayed?

About 0% of weekly flights between London and Washington, D.C. have experienced delays in the past year, with the average delay time being 0 minutes.

What is the most punctual flight time for London to Washington, D.C. flights?

Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving at night tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Friday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.

Related info for your journey

Find useful and relevant information for your journey from Stansted to Dulles Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from London Stansted Airport to Washington, D.C. Dulles Intl Airport?

    Departing from London Stansted Airport to Washington, D.C. Dulles Intl Airport will take you 23h. There are 3683 mi between London Stansted Airport and Washington, D.C. Dulles Intl Airport.

  • Can I find deals for flights from Stansted to Dulles Intl that include hotel bookings?

    Yes. In addition to deals on Stansted to Dulles Intl flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Stansted to Dulles Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Stansted to Dulles Intl.

  • Can I find deals for business class flights from Stansted to Dulles Intl?

    Yes. Cheapflights offers flight deals from Stansted to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Travelling to a place near Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Silver Spring
Hanover
Oxon Hill
Woodbridge
Arlington
Alexandria
Sterling
College Park

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How does Cheapflights help users find flights from Stansted to Dulles Intl?

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Why should you use Cheapflights to find cheap flight tickets from Stansted to Dulles Intl?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Dulles Intl from Stansted.

Can Cheapflights find flights from Stansted to Dulles Intl with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Stansted to Dulles Intl flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Stansted to Dulles Intl become cheaper?

Of course! You can now track prices for flights from Stansted to Dulles Intl and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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